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한국생태학회 / v.31, no.2, 2008년, pp.125-129 
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( Prediction of Daphnia Production along a Trophic Gradient ) |
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| 초 록 |
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| To predict Daphnia secondary productivity along a trophic gradient indexed as total phosphorus (TP) concentration, we estimated energy transfer efficiencies from food quality for Daphnia such as eicosa-pentaenoic acid (EPA) or docosahexaenoic acid (DHA) content. Eleven flow-through Daphnia magna growth experiments were conducted with seston from 9 lakes, ponds and river waters. Primary productivities were estimated from food supply rates in the flow-through experiments, producing energy transfer efficiencies from seston to D. magna. We found DHA content was the best predictor of energy transfer efficiencies among the essential fatty acids. An asymptotic saturation model explained 79.6% of the variability In energy transfer efficiencies. Based on empirical data in this study and empirical models from literature, we predict that Daphnia productivity would peak in mesotrophic systems by decreasing food quality and Increasing food quantity along trophic gradient. |
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| 키워드 |
| Daphnia;DHA;Fatty acids;Flow-through experiment;Secondary productivity;TP;Trophic gradient; |
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Journal of Ecology and Field Biology / v.31, no.2, 2008년, pp.125-129
한국생태학회
ISSN : 1975-020X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200821041233416)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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